cyma

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cyma

cyma recta cyma reversa (Alan Witschonke)

n.
Either of two moldings, cyma recta or cyma reversa, having an undulating or S-shaped profile, used especially in classical architecture. Also called cymatium.

[New Latin cȳma, from Greek kūma, wave, cyma, from kuein, to swell.]

A molding having a profile of double curvature; one having an ogee profile.

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The noun has one meaning:

Meaning #1: (classical architecture) a molding for a cornice; in profile it is partly concave and partly convex
  Synonym: cymatium

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